﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Runtime.InteropServices;

namespace AudioRecorder
{
 
        /// 
        /// VedioCapture 的摘要说明。
        /// 
        public class VedioCapture
        {
            private int hCaptureM;
            private bool isUnLoad = false;
            public VedioCapture()
            {
            }
            [DllImport("avicap32.dll")]
            private static extern int capCreateCaptureWindow(string strWindowName, int dwStyle, int x, int y, int width, int height, int hwdParent, int nID);
            [DllImport("user32.dll")]
            private static extern int SendMessage(int hwnd, int wMsg, int wParam, int lParam);
            [DllImport("user32.dll")]
            private static extern int SendMessage(int hwnd, int wMsg, int wParam, string lParam);
            [DllImport("Kernel32.dll")]
            private static extern bool CloseHandle(int hObject);
            public bool Initialize(System.Windows.Forms.Control aContainer, int intWidth, int intHeight)
            {
                hCaptureM = capCreateCaptureWindow("", 0x40000000 | 0x10000000, 0, 0, intWidth, intHeight, aContainer.Handle.ToInt32(), 1);
                if (hCaptureM == 0) return false;

                int ret = SendMessage(hCaptureM, 1034, 0, 0);
                if (ret == 0)
                {
                    CloseHandle(hCaptureM);
                    return false;
                }
                //WM_CAP_SET_PREVIEW
                ret = SendMessage(hCaptureM, 1074, 1, 0);
                if (ret == 0)
                {
                    this.UnLoad();
                    return false;
                }
                //WM_CAP_SET_SCALE
                ret = SendMessage(hCaptureM, 1077, 1, 0);
                if (ret == 0)
                {
                    this.UnLoad();
                    return false;
                }
                //WM_CAP_SET_PREVIEWRATE
                ret = SendMessage(hCaptureM, 1076, 66, 0);
                if (ret == 0)
                {
                    this.UnLoad();
                    return false;
                }
                return true;
            }

            public void SingleFrameBegin()
            {
                //
                int ret = SendMessage(hCaptureM, 1094, 0, 0);
            }
            public void SingleFrameEnd()
            {
                //
                int ret = SendMessage(hCaptureM, 1095, 0, 0);
            }

            public void SingleFrameMode()
            {
                //WM_CAP_GRAB_FRAME
                int ret = SendMessage(hCaptureM, 1084, 0, 0);
                //WM_CAP_SET_PREVIEW 
                //int ret = SendMessage(  hCaptureM, 1074 , 0, 0 );
                //WM_CAP_SINGLE_FRAME
                //ret = SendMessage( hCaptureM, 1096 , 0, 0 );
            }
            public void PreviewMode()
            {
                int ret = SendMessage(hCaptureM, 1074, 1, 0);
            }

            public void UnLoad()
            {
                int ret = SendMessage(hCaptureM, 1035, 0, 0);
                CloseHandle(this.hCaptureM);
                isUnLoad = true;
            }

            public void CopyToClipBorad()
            {
                int ret = SendMessage(hCaptureM, 1054, 0, 0);
            }

            public void ShowFormatDialog()
            {
                int ret = SendMessage(hCaptureM, 1065, 0, 0);
            }
            public void SaveToDIB(string fileName)
            {
                int ret = SendMessage(hCaptureM, 1049, 0, fileName);
            }

            public void ShowDisplayDialog()
            {
                int ret = SendMessage(hCaptureM, 1067, 0, 0);
            }
            public System.Drawing.Image getCaptureImage()
            {
                System.Windows.Forms.IDataObject iData = System.Windows.Forms.Clipboard.GetDataObject();
                System.Drawing.Image retImage = null;
                if (iData != null)
                {
                    if (iData.GetDataPresent(System.Windows.Forms.DataFormats.Bitmap))
                    {
                        retImage = (System.Drawing.Image)iData.GetData(System.Windows.Forms.DataFormats.Bitmap);
                    }
                    else if (iData.GetDataPresent(System.Windows.Forms.DataFormats.Dib))
                    {
                        retImage = (System.Drawing.Image)iData.GetData(System.Windows.Forms.DataFormats.Dib);
                    }
                }
                return retImage;
            }

            ~VedioCapture()
            {
                if (!isUnLoad)
                {
                    this.UnLoad();
                }
            }
        }
    }

